[PATCH v1] arm64: dts: qcom: qcm6490-rb3gen2: enable Bluetooth

[Janaki Ramaiah Thota]

Add Bluetooth and UART7 support for qcs6490-rb3gen2.

Signed-off-by: Janaki Ramaiah Thota <quic_janathot@xxxxxxxxxxx>
---
 arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 120 +++++++++++++++++++
 1 file changed, 120 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
index 0d45662b8028..a5da7657e47e 100644
--- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
@@ -32,6 +32,8 @@
 
 	aliases {
 		serial0 = &uart5;
+		bluetooth0 = &bluetooth;
+		serial1 = &uart7;
 	};
 
 	chosen {
@@ -688,6 +690,39 @@
 	status = "okay";
 };
 
+&qup_uart7_cts {
+	/*
+	 * Configure a bias-bus-hold on CTS to lower power
+	 * usage when Bluetooth is turned off. Bus hold will
+	 * maintain a low power state regardless of whether
+	 * the Bluetooth module drives the pin in either
+	 * direction or leaves the pin fully unpowered.
+	 */
+	bias-bus-hold;
+};
+
+&qup_uart7_rts {
+	/* We'll drive RTS, so no pull */
+	drive-strength = <2>;
+	bias-disable;
+};
+
+&qup_uart7_rx {
+	/*
+	 * Configure a pull-up on RX. This is needed to avoid
+	 * garbage data when the TX pin of the Bluetooth module is
+	 * in tri-state (module powered off or not driving the
+	 * signal yet).
+	 */
+	bias-pull-up;
+};
+
+&qup_uart7_tx {
+	/* We'll drive TX, so no pull */
+	drive-strength = <2>;
+	bias-disable;
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };
@@ -719,12 +754,97 @@
 &tlmm {
 	gpio-reserved-ranges = <32 2>, /* ADSP */
 			       <48 4>; /* NFC */
+	bt_en: bt-en-state {
+		pins = "gpio85";
+		function = "gpio";
+		output-low;
+		bias-disable;
+	};
+
+	qup_uart7_sleep_cts: qup-uart7-sleep-cts-state {
+		pins = "gpio28";
+		function = "gpio";
+		/*
+		 * Configure a bias-bus-hold on CTS to lower power
+		 * usage when Bluetooth is turned off. Bus hold will
+		 * maintain a low power state regardless of whether
+		 * the Bluetooth module drives the pin in either
+		 * direction or leaves the pin fully unpowered.
+		 */
+		bias-bus-hold;
+	};
+
+	qup_uart7_sleep_rts: qup-uart7-sleep-rts-state {
+		pins = "gpio29";
+		function = "gpio";
+		/*
+		 * Configure pull-down on RTS. As RTS is active low
+		 * signal, pull it low to indicate the BT SoC that it
+		 * can wakeup the system anytime from suspend state by
+		 * pulling RX low (by sending wakeup bytes).
+		 */
+		bias-pull-down;
+	};
+
+	qup_uart7_sleep_rx: qup-uart7-sleep-rx-state {
+		pins = "gpio31";
+		function = "gpio";
+		/*
+		 * Configure a pull-up on RX. This is needed to avoid
+		 * garbage data when the TX pin of the Bluetooth module
+		 * is floating which may cause spurious wakeups.
+		 */
+		bias-pull-up;
+	};
+
+	qup_uart7_sleep_tx: qup-uart7-sleep-tx-state {
+		pins = "gpio30";
+		function = "gpio";
+		/*
+		 * Configure pull-up on TX when it isn't actively driven
+		 * to prevent BT SoC from receiving garbage during sleep.
+		 */
+		bias-pull-up;
+	};
+
+	sw_ctrl: sw-ctrl-state {
+		pins = "gpio86";
+		function = "gpio";
+		bias-pull-down;
+	};
 };
 
 &uart5 {
 	status = "okay";
 };
 
+&uart7 {
+	status = "okay";
+	/delete-property/interrupts;
+	interrupts-extended = <&intc GIC_SPI 608 IRQ_TYPE_LEVEL_HIGH>,
+				<&tlmm 31 IRQ_TYPE_EDGE_FALLING>;
+	pinctrl-names = "default", "sleep";
+	pinctrl-1 = <&qup_uart7_sleep_cts>, <&qup_uart7_sleep_rts>,
+			<&qup_uart7_sleep_tx>, <&qup_uart7_sleep_rx>;
+
+	bluetooth: bluetooth {
+		compatible = "qcom,wcn6750-bt";
+		pinctrl-names = "default";
+		pinctrl-0 = <&bt_en>, <&sw_ctrl>;
+		enable-gpios = <&tlmm 85 GPIO_ACTIVE_HIGH>;
+		swctrl-gpios = <&tlmm 86 GPIO_ACTIVE_HIGH>;
+		vddaon-supply = <&vreg_s7b_0p972>;
+		vddbtcxmx-supply = <&vreg_s7b_0p972>;
+		vddrfacmn-supply = <&vreg_s7b_0p972>;
+		vddrfa0p8-supply = <&vreg_s7b_0p972>;
+		vddrfa1p7-supply = <&vreg_s1b_1p872>;
+		vddrfa1p2-supply = <&vreg_s8b_1p272>;
+		vddrfa2p2-supply = <&vreg_s1c_2p19>;
+		vddasd-supply = <&vreg_l11c_2p8>;
+		max-speed = <3200000>;
+	};
+};
+
 &usb_1 {
 	status = "okay";
 };
-- 
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